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A kind of ionic self-healing polymer material with controllable mechanical properties and its preparation method

A technology of polymer materials and mechanical properties, applied in the field of ion self-healing polymer materials and preparation, can solve problems such as weak mechanical properties, achieve low cost, simple preparation process, and increase the effect of application range

Active Publication Date: 2021-05-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This repair method can achieve repeated repairs, but because the chain segment motion is the main driving force for the material to achieve repair, limited by the chain segment motion, the intrinsic self-healing polymer materials prepared so far are soft and weak rubber or even is a gel with lower mechanical properties

Method used

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  • A kind of ionic self-healing polymer material with controllable mechanical properties and its preparation method
  • A kind of ionic self-healing polymer material with controllable mechanical properties and its preparation method
  • A kind of ionic self-healing polymer material with controllable mechanical properties and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] At 20°C, add 1.014g of bis(biphenyl)norbornene compound and 5g of 5-norbornene-2-methylene-1-hexyl-3hydro-imidazole bis Trifluoromethylsulfonylimide compound and 25mL of dichloromethane were stirred and mixed for 10min to obtain a mixture; 29.72mg of dichloro[1,3-bis(2,4,6-trimethylphenyl )-2-imidazolidinylidene] (benzylidene) two (3-bromopyridine) ruthenium (II) catalysts and 5mL of dichloromethane, then carry out 3min ultrasonic treatment, the catalyst is fully dissolved in dichloromethane, A catalyst solution was obtained; under the condition of stirring, the catalyst solution was added into the above-mentioned polymerization reaction bottle to carry out a polymerization reaction for 6 hours. After the polymerization was completed, 100 eqv of vinyl ether was added to the above-mentioned polymerization reaction flask under stirring conditions to terminate the polymerization reaction; after 20 minutes, the obtained polymerization reaction solution was dried in a vacuum...

Embodiment 2

[0061] At 25°C, 557.9mg of bis(biphenyl)norbornene compound and 10mL of dichloromethane were respectively placed in a dry polymerization flask, stirred and mixed for 10min to obtain a mixture; 45.9mg of dichloro[1 , 3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene](benzylidene)bis(3-bromopyridine)ruthenium(II) catalyst and 5 mL of dichloromethane, then Ultrasonic treatment was performed for 3 minutes to fully dissolve the catalyst in methylene chloride to obtain a catalyst solution; under stirring conditions, the catalyst solution was added to the above-mentioned polymerization reaction bottle to perform a polymerization reaction for 0.5 h. Add 5g of 5-norbornene-2-methylene-1-hexyl-3hydro-imidazole bistrifluoromethylsulfonylimide compound and 10mL of dichloromethane into the small ampoule, and then perform ultrasonic treatment for 3min, Under the condition of stirring, the monomer solution was added into the above-mentioned polymerization reaction bottle to carry out the po...

Embodiment 3

[0069] At 40°C, 463mg of bis(biphenyl)norbornene compound and 5mL of dichloromethane were placed in a dry polymerization flask, and stirred and mixed for 10 minutes to obtain a mixture; 41.1mg of dichloro[1, 3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene](benzylidene)bis(3-bromopyridine)ruthenium(II) catalyst and 5 mL of dichloromethane, followed by Ultrasonic treatment for 3 minutes, the catalyst was fully dissolved in dichloromethane to obtain a catalyst solution; under the condition of stirring, the catalyst solution was added to the above-mentioned polymerization reaction bottle to carry out a polymerization reaction for 0.5 hours. Add 5g of 5-norbornene-2-methylene-1-hexyl-3hydro-imidazole bistrifluoromethylsulfonylimide compound and 10mL of dichloromethane into the small ampoule, and then perform ultrasonic treatment for 3min, Under the condition of stirring, the monomer solution was added into the above-mentioned polymerization reaction bottle to carry out the polym...

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Abstract

The invention relates to an ionic self-repairing polymer material with controllable mechanical properties and a preparation method thereof, which comprises dichloro[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene] (Benzylidene) under the effect of two (3-bromopyridine) ruthenium (II) catalysts, the derivative of bis (biphenyl) norbornene compound and the norbornene containing imidazolium ion is adopted in dichloromethane solvent Ring-opening metathesis polymerization is carried out by one feeding or sequential feeding method. After the reaction is terminated with a terminator, self-healing materials of random, diblock and triblock ionic copolymers are obtained respectively; wherein: bis(biphenyl) The molar ratio of norbornene, norbornene derivatives containing imidazolium ions and the catalyst is 150-250:25-75:1. The invention has simple process, easy-to-obtain raw materials, controllable mechanical properties and repair performance compared with existing materials, can realize efficient repair of hard materials, and improves the application range of self-repair materials.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an ion self-repairing polymer material with controllable mechanical properties and a preparation method thereof. Background technique [0002] Polymer materials are more and more widely used in industry and life due to their light weight, wear resistance and easy processing. , will inevitably cause microcracks inside the material, and these microcracks are the root of macroscopic cracks, which will damage the overall performance of the polymer material. If polymer materials can be endowed with self-healing properties, the service life, safety, and reliability of polymer materials can be improved, thereby improving energy efficiency, reducing resource waste, and reducing environmental pressure. [0003] At present, there are many classification methods of self-healing materials, which can be divided into two categories: foreign aid type and intrinsic type according to w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/08
CPCC08G61/08C08G2261/122C08G2261/126C08G2261/143C08G2261/148C08G2261/3324C08G2261/418
Inventor 李悦生崔静潘莉马哲王彬
Owner TIANJIN UNIV